Pytest

#pytest   #unittest   #python  

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Table of Content

Test

Tests structure

• Arrange (setup)
• Act (object/method under test)
• Assert
• Cleanup

simple demo

Note

pytest search all module that naming start with test prefix and method start with test prefix

test_demo.py

def test_func():
    assert 1 == 1

def test_func_fail():
    assert 1 == 2

# from project root folder run
# run all tests
pytest

# run module tests
pytest test_demo.py

# run specific test from module
pytest test_demo.py::test_func

run test and output to stdout

pytest -s test_demo.py::test_func

parts

• fixture
• mock
• params
• conftest
• logging

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VSCode config

!!! note pytest.ini pytest configuration file that allows changing the default behavior

for example: add logging support

```ini
[pytest]
log_cli = True
log_cli_format = %(asctime)s %(levelname)s %(message)s
log_cli_level = DEBUG
```

"python.testing.pytestEnabled": true,
"python.testing.pytestArgs": [
        "-c",
        "/path/to/your/pytest.ini"
    ],

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Reference

• Python Testing with pytest (by Brian Okken)